Super-hardy bunching onion that originated in northern China or Siberia, despite its name. Grown for its thick green stems and hollow leaves which possess a sharp onion flavor. This perennial never forms a bulb in the garden; once established, new plants can be raised by replanting the abundant side-shoots. May be blanched like leeks by earthing up the thick stems as the plants grow. Widely employed in the cuisines of Japan, Taiwan, and China. This crop is also grown among the Welsh, hence its name. Easy to grow and productive once established.